home page keeps changing by itself, why?

Can you tell me why the homepage keeps changing to something other than I ask for? I even uninstalled and reinstalled and the same thing keeps happening. Running latest firefox on xp machine. This URL keeps taking over:
http://home.speedbit.com/?aff=205
contact me at gmsdental at gmail dot com
Thanks

Can you tell me why the homepage keeps changing to something other than I ask for? I even uninstalled and reinstalled and the same thing keeps happening. Running latest firefox on xp machine. This URL keeps taking over:
http://home.speedbit.com/?aff=205
contact me at gmsdental at gmail dot com
Thanks

The URL to add in "keyword.URL" becomes a link in this post, so right click it and choose "Copy Link Location" to copy it to the Windows clipboard. Then hit
CTRL+V to paste it. Saves you having to type the whole thing.

To reset your home page, do the following.

Go to the site you want to set as your homepage.

Click the Firefox button, go to Options | Options | General.

Make sure it says "Show My Homepage" in the first dropdown menu.

Click the button called "Use Current Pages" to set the homepage to the one you have on the screen.

Please do the following.<br><br>
#In the location bar where you normally type in a web address, type '''about:config''' and hit Enter.<br><br>
#In the filter at the top, type: '''keyword.URL'''<br><br>
#Double click it and remove whatever's in there and replace it with http://www.google.com/search?q= and then click OK.<br><br>
#Close the tab
The URL to add in "keyword.URL" becomes a link in this post, so right click it and choose "Copy Link Location" to copy it to the Windows clipboard. Then hit
CTRL+V to paste it. Saves you having to type the whole thing.
----
'''To reset your home page, do the following'''.<br><br>
* Go to the site you want to set as your homepage.<br><br>
* Click the Firefox button, go to '''Options '''| '''Options '''| '''General'''.<br><br>
* Make sure it says "''Show My Homepage''" in the first dropdown menu.<br><br>
* Click the button called "'''Use Current Pages'''" to set the homepage to the one you have on the screen.<br>